randDNA: A function to generate random DNA sequences.
Description
This function generates random DNA sequences, nucleotides are
sampled with frequency 0.25 each.
Usage
randDNA(n)
Arguments
n
The length of the sequence desired.
Value
A length one character vector, with n characters randomly
chosen from A, C, T and G.
Details
This function generates random sequences of A, C, T and G.
Real DNA is quite different, so one should not use these sequences
for much other than pedagogical purposes.